参数资料
| 型号： | MAX1801EKA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/16页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR DC-DC SOT23-8 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 控制器，数字式相机 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 1 |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
Digital Camera Step-Up Slave
DC-DC Controller
separate low-noise ground plane containing the refer-
INPUT
D 3
V OUT -
ence and signal grounds should connect only to the
power-ground plane at one point to minimize the
effects of power-ground currents.
MAIN
ON
DCON
EXT
L
Q 1
C 1
C 3
D 1
D 2
C 2
R 1
V OUT +
Keep the voltage feedback network very close to the
IC, preferably within 0.2in (5mm) of the FB pin. Nodes
with high dv/dt (switching nodes) should be kept as
small as possible and should be kept away from high-
impedance nodes such as FB.
Circuit-board layouts that are susceptible to electrical
noise can require a lowpass RC filter at OSC and
MAX1801
COMP
FB
R 2
bypassing at REF and IN. If an RC filter is used at OSC,
the pole frequency should be at least 20 times larger
than the oscillator frequency to prevent distortion of the
OSC signal. To ensure minimal loading of the master
R C
G C
Figure 8. Auxiliary Controller, Charge-Pump Configuration
Designing a PC Board
A good PC board layout is important to achieve optimal
performance from the MAX1801. Poor design can cause
excessive conducted and/or radiated noise, both of
which can cause instability and/or regulation errors.
Conductors carrying discontinuous currents should be
kept as short as possible, and conductors carrying
high currents should be made as wide as possible. A
Pin Configuration
oscillator, which would cause an oscillator frequency
shift, choose a filter capacitor smaller than C OSC /(100
N), where C OSC is the timing capacitor for the master
oscillator and N is the number of MAX1801 slaves con-
nected to the master. Then choose R FILTER = 1/(40 π
f OSC C FILTER ).
If bypass capacitors are required on IN and REF, use
0.1μF ceramic capacitors because of their low imped-
ance at high frequencies. The bypass and filter compo-
nents should be placed within 5mm (0.2in) of the
MAX1801 pins.
Refer to the MAX1800 evaluation kit (EV kit) or
MAX1802 EV kit data sheets for full PC board exam-
ples.
Chip Information
TRANSISTOR COUNT: 1130
TOP VIEW
OSC
GND
1
2
8
7
DL
IN
MAX1801
REF
3
6
FB
DCON 4
SOT23-8
5
COMP
______________________________________________________________________________________
15
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| MAX1804EUB+ | IC FEEDBACK INTERGRATOR 10UMAX |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1802EHJ | 功能描述:直流/直流开关转换器 Step-Up Slave DC/DC Controller RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1802EHJ+ | 功能描述:直流/直流开关转换器 Step-Up Slave DC/DC Controller RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1802EHJ+T | 功能描述:直流/直流开关转换器 Step-Up Slave DC/DC Controller RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1802EHJ-T | 功能描述:直流/直流开关转换器 Step-Up Slave DC/DC Controller RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1804EUB | 功能描述:电流和电力监控器、调节器 RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
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